Fasti Herefordenses gives him as vicar choral from 1558 until his death 1606, he was organist and succentor.
| Year | Type | Name as Recorded | Location | Office/Status | Full Record |
|---|---|---|---|---|---|
| 1558 | Appt(Collation) | Mason, Thomas | Hereford Cathedral / Diddlebury | vicar in the choir | View |
| 1562 | Appt(Resignation) | Mason, Thomas | Hereford Cathedral / Diddlebury | vicar in the choir | View |
| 1566 | Appt(Admission) | Mason, Thomas | Hereford Cathedral / Absolon Clerke | vicar in the choir | View |
| 1567 | Appt(Appointment) | Mason, Thomas | Hereford Cathedral / | secondary | View |
| 1577 | Appt(Admission) | Mason, Thomas | Hereford Cathedral / Lyre | vicar in the choir | View |
| 1577 | Vac(cession) | Mason, Thomas | Hereford Cathedral / St Trinity alias Absolom Clerke | vicar in the choir | View |
| 1577 | Appt(Nomination) | Mason, Thomas | Hereford Cathedral / Lyre | vicar in the choir | View |
| 1577 | Vac(not given) | Mason, Thomas | Hereford Cathedral / | secondary | View |
| 1582 | Appt(Admission) | Mason, Thomas | Hereford Cathedral / | succentor | View |
| 1585 | Appt(election) | Mason, Thomas | Hereford Cathedral / | custos | View |
| 1586 | Appt(election) | Mason, Thomas | Hereford Cathedral / | custos | View |
| 1587 | Appt(Admission) | Mason, Thomas | Hereford Cathedral / | vicar choral | View |
| 1588 | Libc | Mason, Thomas | Hereford cathedral / | vicar choral | View |
| 1589 | Appt(Appointment) | Mason, Thomas | Hereford Cathedral / | organist | View |
| 1596 | Libc | Mason, Thomas | Hereford cathedral / | warden | View |
| 1605 | Vac(Death) | Mason, Thomas | Hereford Cathedral / Lyra | petty canon | View |